mahender-reddy85/QRender ? reverse-engineered prompt

Build me a modern QR code generator web app that feels clean and easy to use on desktop and mobile. I want users to be able to pick what kind of QR code they are making, like a website link, plain text, contact card, WiFi details, location, email, phone number, SMS, or even a file based code for things like PDFs, images, videos, and music. The app should let people change the QR color, background color, and size, then generate the code instantly and download it when they are happy with it.

Make the interface responsive and polished, with a nice 3D flip effect between the input form and the QR preview. Keep the flow simple, with a clear way to go back and create another code. If you need current details for any library or API, look them up online and use the latest docs.